Trait sp_trie::TrieLayout

pub trait TrieLayout {
    type Hash: Hasher;
    type Codec: NodeCodec<HashOut = <Self::Hash as Hasher>::Out>;

    const USE_EXTENSION: bool;
    const MAX_INLINE_VALUE: Option<u32>;
    const ALLOW_EMPTY: bool = false;
}

Various re-exports from the trie-db crate. Trait with definition of trie layout. Contains all associated trait needed for a trie definition or implementation.

Required Associated Types

type Hash: Hasher

Hasher to use for this trie.

type Codec: NodeCodec<HashOut = <Self::Hash as Hasher>::Out>

Codec to use (needs to match hasher and nibble ops).

Required Associated Constants

const USE_EXTENSION: bool

If true, the trie will use extension nodes and no partial in branch, if false the trie will only use branch and node with partials in both.

const MAX_INLINE_VALUE: Option<u32>

Threshold above which an external node should be use to store a node value.

Provided Associated Constants

const ALLOW_EMPTY: bool = false

If true, the trie will allow empty values into TrieDBMut

Object Safety

This trait is not object safe.

Implementors

impl<H> TrieLayout for LayoutV0<H>

where H: Hasher,

const USE_EXTENSION: bool = false

const ALLOW_EMPTY: bool = true

const MAX_INLINE_VALUE: Option<u32> = None

type Hash = H

type Codec = NodeCodec<<LayoutV0<H> as TrieLayout>::Hash>

impl<H> TrieLayout for LayoutV1<H>

where H: Hasher,

const USE_EXTENSION: bool = false

const ALLOW_EMPTY: bool = true

const MAX_INLINE_VALUE: Option<u32> = _

type Hash = H

type Codec = NodeCodec<<LayoutV1<H> as TrieLayout>::Hash>